Examlex
Explain the differences between the rods and cones in the retina.
Active Transport
The movement of molecules across a cell membrane from a region of lower concentration to one of higher concentration, requiring energy.
Facilitated Transport
A process of passive transport, mediated by carrier proteins, that allows substances to move across cell membranes without expending energy.
Active Transport
The movement of molecules across a cell membrane from a lower to a higher concentration, requiring energy.
Mitochondria
Organelles within cells that are the sites of aerobic respiration, providing energy for cellular functions.
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